<script setup>
import { Edit, Delete } from "@element-plus/icons-vue";

import { ref } from "vue";

//文章分类数据模型
const categorys = ref([]);

//用户搜索时选中的分类id
const categoryId = ref("");

//用户搜索时选中的发布状态
const state = ref("");

//文章列表数据模型
const articles = ref([]);

//分页条数据模型
const pageNum = ref(1); //当前页
const total = ref(20); //总条数
const pageSize = ref(3); //每页条数

//当每页条数发生了变化，调用此函数
const onSizeChange = size => {
  pageSize.value = size;
  getArticles();
};
//当前页码发生变化，调用此函数
const onCurrentChange = num => {
  pageNum.value = num;
  getArticles();
};

//文章列表查询
import { articleCategoryListService } from "@/api/article.js";
const getArticleCategoryList = async () => {
  //获取所有分类
  let resultC = await articleCategoryListService();
  categorys.value = resultC.data;
};
getArticleCategoryList();

//文章列表查询
import { articleListService } from "@/api/article.js";
const getArticles = async () => {
  let params = {
    pageNum: pageNum.value,
    pageSize: pageSize.value,
    categoryId: categoryId.value ? categoryId.value : null,
    state: state.value ? state.value : null
  };
  let result = await articleListService(params);
  //渲染列表数据
  articles.value = result.data.items;
  //为列表中添加categoryName属性
  for (let i = 0; i < articles.value.length; i++) {
    let article = articles.value[i];
    for (let j = 0; j < categorys.value.length; j++) {
      if (article.categoryId === categorys.value[j].id) {
        article.categoryName = categorys.value[j].categoryName;
      }
    }
  }
  //渲染总条数
  total.value = result.data.total;
};
getArticles();

import { QuillEditor } from "@vueup/vue-quill";
import "@vueup/vue-quill/dist/vue-quill.snow.css";
import { Plus } from "@element-plus/icons-vue";
import { useTokenStore } from "@/stores/token";
//控制抽屉是否显示
const visibleDrawer = ref(false);
//抽屉标题
const title = ref("");
//添加表单数据模型
const articleModel = ref({
  title: "",
  categoryId: "",
  coverImg: "",
  content: "",
  state: ""
});
const tokenStore = useTokenStore();
//上传图片成功回调
const uploadSuccess = img => {
  //img就是后台响应的数据，格式为：{code:状态码，message：提示信息，data: 图片的存储地址}
  articleModel.value.coverImg = img.data;
};

import { articleAddService } from "@/api/article";
import { ElMessage } from "element-plus";
//添加文章
const addArticle = async state => {
  // 抽屉标题
  title.value = "添加文章";
  
  articleModel.value.state = state;
  let result = await articleAddService(articleModel.value);
  ElMessage.success(result.message ? result.message : "添加成功");

  //再次调用getArticles,获取文章
  getArticles();
  //隐藏抽屉
  visibleDrawer.value = false;
};

// 更新文章
import { articleUpdateService } from "@/api/article";
import { articleDetailService } from "@/api/article";
// 更新文章回显
const updateArticleEcho = async row => {
  //开启抽屉
  visibleDrawer.value = true;
  //根据id查询文章
  let result = await articleDetailService(row.id);
  //将查询到的数据赋值给articleModel
  articleModel.value = result.data;
};
const updateArticle = async state => {
  articleModel.value.state = state;
  let result = await articleUpdateService(articleModel.value);
  ElMessage.success(result.message == "操作成功" ? "更新成功" : "更新失败");
  visibleDrawer.value = false;
  //再次调用getArticles,获取文章
  getArticles();
};

// 删除文章
import { articleDeleteService } from "@/api/article";
import { ElMessageBox } from "element-plus";
const deleteArticle = async row => {
  ElMessageBox.confirm("你确认删除该文章吗？", "温馨提示", {
    confirmButtonText: "确认",
    cancelButtonText: "取消",
    type: "warning"
  }).then(async () => {
    //用户点击了确认
    let result = await articleDeleteService(row.id);
    ElMessage.success(result.message ? result.message : "删除成功");
    getArticles();
  });
};
</script>
<template>
  <el-card class="page-container">
    <template #header>
      <div class="header">
        <span>文章管理</span>
        <div class="extra">
          <el-button
            type="primary"
            @click="articleModel = {};visibleDrawer = true;title = '添加文章';"
          >添加文章</el-button>
        </div>
      </div>
    </template>
    <!-- 搜索表单 -->
    <el-form inline>
      <el-form-item label="文章分类：">
        <el-select placeholder="请选择" v-model="categoryId">
          <el-option v-for="c in categorys" :key="c.id" :label="c.categoryName" :value="c.id"></el-option>
        </el-select>
      </el-form-item>

      <el-form-item label="发布状态：">
        <el-select placeholder="请选择" v-model="state">
          <el-option label="已发布" value="已发布"></el-option>
          <el-option label="草稿" value="草稿"></el-option>
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="getArticles">搜索</el-button>
        <el-button @click="categoryId='';state=''">重置</el-button>
      </el-form-item>
    </el-form>
    <!-- 文章列表 -->
    <el-table :data="articles" style="width: 100%">
      <el-table-column label="文章标题" width="400" prop="title"></el-table-column>
      <el-table-column label="分类" prop="categoryId"></el-table-column>
      <el-table-column label="发表时间" prop="createTime"></el-table-column>
      <el-table-column label="状态" prop="state"></el-table-column>
      <el-table-column label="操作" width="100">
        <template #default="{ row }">
          <el-button
            :icon="Edit"
            circle
            plain
            type="primary"
            @click="updateArticleEcho(row);title= '更新文章';"
          ></el-button>
          <el-button :icon="Delete" circle plain type="danger" @click="deleteArticle(row)"></el-button>
        </template>
      </el-table-column>
      <template #empty>
        <el-empty description="没有数据" />
      </template>
    </el-table>
    <!-- 抽屉 -->
    <el-drawer v-model="visibleDrawer" :title="title" direction="rtl" size="50%">
      <!-- 添加文章表单 -->
      <el-form :model="articleModel" label-width="100px">
        <el-form-item label="文章标题">
          <el-input v-model="articleModel.title" placeholder="请输入标题"></el-input>
        </el-form-item>
        <el-form-item label="文章分类">
          <el-select placeholder="请选择" v-model="articleModel.categoryId">
            <el-option v-for="c in categorys" :key="c.id" :label="c.categoryName" :value="c.id"></el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="文章封面">
          <el-upload
            class="avatar-uploader"
            :auto-upload="true"
            :show-file-list="false"
            action="/api/article/upload"
            name="file"
            :headers="{'token':tokenStore.token}"
            :on-success="uploadSuccess"
          >
            <img v-if="articleModel.coverImg" :src="articleModel.coverImg" class="avatar" />
            <el-icon v-else class="avatar-uploader-icon">
              <Plus />
            </el-icon>
          </el-upload>
        </el-form-item>
        <el-form-item label="文章内容">
          <div class="editor">
            <quill-editor theme="snow" :content="articleModel.content" contentType="html"></quill-editor>
          </div>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" @click="title=='添加文章'?addArticle('已发布'):updateArticle('已发布')">发布</el-button>
          <el-button type="info" @click="title=='添加文章'?addArticle('草稿'):updateArticle('草稿')">草稿</el-button>
        </el-form-item>
      </el-form>
    </el-drawer>

    <!-- 分页条 -->
    <el-pagination
      v-model:current-page="pageNum"
      v-model:page-size="pageSize"
      :page-sizes="[3, 5 ,10, 15]"
      layout="jumper, total, sizes, prev, pager, next"
      background
      :total="total"
      @size-change="onSizeChange"
      @current-change="onCurrentChange"
      style="margin-top: 20px; justify-content: flex-end"
    />
  </el-card>
</template>
<style lang="scss" scoped>
.page-container {
  min-height: 100%;
  box-sizing: border-box;

  .header {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
}

/* 抽屉样式 */
.avatar-uploader {
  :deep() {
    .avatar {
      width: 178px;
      height: 178px;
      display: block;
    }

    .el-upload {
      border: 1px dashed var(--el-border-color);
      border-radius: 6px;
      cursor: pointer;
      position: relative;
      overflow: hidden;
      transition: var(--el-transition-duration-fast);
    }

    .el-upload:hover {
      border-color: var(--el-color-primary);
    }

    .el-icon.avatar-uploader-icon {
      font-size: 28px;
      color: #8c939d;
      width: 178px;
      height: 178px;
      text-align: center;
    }
  }
}
.editor {
  width: 100%;
  :deep(.ql-editor) {
    min-height: 200px;
  }
}
</style>